Portable heaters?

[stumpXJ]

Here is mine, I dont think I have ever had to run it more than 5 minutes to get the shop up to a comfortable level. I insulated my roof and walls though, and that helps tremendously to keep it warm. My large door is also insulated.

For sure anytime you burn... ventilate.

 

[bigalpha]

Roger that. I'm planning on getting a o2 detector to go with it .My garage is built like a pole barn, and not insulated at all...

I have however come up with a free source of material to insulate the place.

So why not insulate your garage and be done with it? Also, you'll need a CO detector, not an O2 detector.